ABSTRACT
Sim is a pencil-and-paper game played by two players on the regular 6-gon. Sim is played by drawing lines on the regular 6-gon. The rule of Sim is described as follows. Mark six vertices on a paper and each player draws one of the 15 lines alternately. Suppose that the first player (R) uses a red pen and the second player (B) uses a blue pen. If there is no colored pen, use a pencil with dots or straight lines. Players draw their colored lines alternately. If one player has a triangle with one color, that player loses the game.
